JP2008093335A - Metallic golf club head - Google Patents

Metallic golf club head Download PDF

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Publication number
JP2008093335A
JP2008093335A JP2006281405A JP2006281405A JP2008093335A JP 2008093335 A JP2008093335 A JP 2008093335A JP 2006281405 A JP2006281405 A JP 2006281405A JP 2006281405 A JP2006281405 A JP 2006281405A JP 2008093335 A JP2008093335 A JP 2008093335A
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golf club
head
screw
magnesium alloy
club head
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Makoto Kubota
誠 久保田
Hideo Matsunaga
英夫 松永
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Bridgestone Sports Co Ltd
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Bridgestone Sports Co Ltd
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Priority to JP2006281405A priority Critical patent/JP2008093335A/en
Priority to KR1020070090702A priority patent/KR20080034392A/en
Priority to US11/869,001 priority patent/US20080090677A1/en
Publication of JP2008093335A publication Critical patent/JP2008093335A/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0466—Heads wood-type
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0433—Heads with special sole configurations
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0437—Heads with special crown configurations
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/047—Heads iron-type
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B2053/0491—Heads with added weights, e.g. changeable, replaceable
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/32—Golf
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Golf Clubs (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metallic golf club head which improves both ball hitting feeling and sound. <P>SOLUTION: A screw 32 made of a magnesium alloy treated against corrosion is mounted at a prescribed location of a metallic head body 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、打感および打音が良い金属製ゴルフクラブヘッドに関する。   The present invention relates to a metal golf club head having good feel and sound.

中空部を有する金属製のゴルフクラブヘッドは大型化が進み、ロフト角が１３度以下のいわゆるドライバーヘッドは、ヘッド体積が３００ｃｃを越え、３５０ｃｃ〜５００ｃｃのものが主流となってきた。ドライバーヘッドの場合、ヘッド重量は２００ｇ以下、好ましくは１８０ｇ〜１９５ｇ程度であり、チタニウム合金の比重が４．２〜５．０であるため、クラウン部、サイド部およびソール部の肉厚を薄くすることが行われており、場合によってはフェース部の肉厚も部分的に薄くすることが行われている。   The size of metal golf club heads having hollow portions has been increased, and so-called driver heads having loft angles of 13 degrees or less have head volumes exceeding 300 cc, and those having a head volume of 350 cc to 500 cc have become mainstream. In the case of a driver head, the head weight is 200 g or less, preferably about 180 g to 195 g, and the specific gravity of the titanium alloy is 4.2 to 5.0, so that the thickness of the crown part, the side part and the sole part is reduced. In some cases, the thickness of the face portion is also partially reduced.

以前は、鋳造で製造されるチタニウム合金（例えば、Ｔｉ−６Ａｌ−４Ｖ）製の中空部を有するドライバーヘッドは、クラウン部、ソール部およびサイド部の肉厚は１．２ｍｍ程度、フェース部の肉厚は３ｍｍ程度であった。最近では、β型チタニウム合金などにより板材をプレス成形してゴルフクラブヘッドの各部分（ソール部、サイド部、クラウン部、フェース部、あるいはこれらの２つ以上を一体にしたものなど）を作製した後、これらを溶接により固定して中空部を有するゴルフクラブヘッドを製造することが行われている（例えば、特許文献１参照）。鋳造では、ロストワックス製法（インベストメントキャスティング法）により金属を溶かしてセラミック製の型に流し込む方法が採られ、各部分を薄肉化するのは難しかったが、プレス成形によりゴルフクラブヘッドの各部分を作製する方法では、各部分の肉厚を薄くすることができるため、１ｍｍ以下の肉厚も可能となり、より大型のゴルフクラブヘッドを製造することが可能となった。   Previously, a driver head having a hollow portion made of a titanium alloy (for example, Ti-6Al-4V) manufactured by casting has a crown portion, a sole portion and a side portion having a thickness of about 1.2 mm, and a face portion having a thickness of about 1.2 mm. The thickness was about 3 mm. Recently, a plate material is press-molded with a β-type titanium alloy or the like to produce golf club head parts (a sole part, a side part, a crown part, a face part, or a combination of two or more thereof). Thereafter, these are fixed by welding to produce a golf club head having a hollow portion (see, for example, Patent Document 1). In casting, the lost wax manufacturing method (investment casting method) was used to melt the metal and cast it into a ceramic mold. Although it was difficult to reduce the thickness of each part, each part of the golf club head was manufactured by press molding. In this method, since the thickness of each part can be reduced, a thickness of 1 mm or less is also possible, and a larger golf club head can be manufactured.

特開２００３−５２８６６号公報JP 2003-52866 A

しかし、ゴルフクラブヘッドの薄肉化、大型化により、ゴルフボールを打ったときのゴルフクラブヘッドの振動が大きくなり、打感および打音に関して好ましくない影響が生じてきた。   However, as the golf club head becomes thinner and larger, the golf club head vibrates when the golf ball is hit, which has an unfavorable effect on feel and sound.

本発明は、前述した事情に鑑みてなされたもので、打感および打音の両方を向上させた金属製ゴルフクラブヘッドを提供することを目的とする。   The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a metal golf club head in which both the hit feeling and the hitting sound are improved.

本発明は、前記目的を達成するため、金属製ヘッド本体の所定箇所に防食処理を施したマグネシウム合金のネジを取り付けたことを特徴とする金属製ゴルフクラブヘッドを提供する。   In order to achieve the above object, the present invention provides a metal golf club head characterized in that a magnesium alloy screw subjected to anticorrosion treatment is attached to a predetermined portion of the metal head main body.

本発明の金属製ゴルフクラブヘッドは、防食処理を施したマグネシウム合金のネジによってゴルフボールを打ったときのゴルフクラブヘッドの振動が効果的に減衰され、打感と打音の両方が向上するものである。   The metal golf club head of the present invention effectively attenuates the vibration of the golf club head when the golf ball is hit with a magnesium alloy screw subjected to anticorrosion treatment, and improves both the feel and sound. It is.

以下、本発明につきさらに詳しく説明する。本発明において、金属製ヘッド本体の材質に限定はないが、例えば、チタニウム合金、ステンレス鋼、アルミニウム合金、低炭素鋼（例えば、Ｓ１５ＣやＳ２５Ｃ）等が挙げられる。また、金属製ヘッド本体は、鋳造により一体に成形したものでもよく、複数のパーツを溶接などによって接合したものでもよい。   Hereinafter, the present invention will be described in more detail. In the present invention, the material of the metal head main body is not limited, and examples thereof include titanium alloy, stainless steel, aluminum alloy, and low carbon steel (for example, S15C and S25C). The metal head main body may be integrally formed by casting, or may be a plurality of parts joined by welding or the like.

本発明に用いる金属製ヘッド本体の種類に限定はないが、肉厚が薄く軽量のドライバーヘッドが特に好ましく、例えば、チタニウム合金（例えば、比重約４．５）あるいはアルミニウム合金（例えば、比重約２．７）からなるヘッド体積が３００〜５００ｃｃのドライバーヘッドを好適に用いることができる。また、比重の大きいステンレス鋼（例えば、比重７．８）製ヘッドでは、ヘッド体積が２００〜３００ｃｃのドライバーヘッドを好適に用いることができる。ヘッドの肉厚は、クラウン部、ソール部、サイド部の最も薄い部分を０．５〜１．０ｍｍ、特に０．６ｍｍ〜０．９ｍｍとすることが適当である。さらに、本発明に用いる金属製ヘッド本体は、中空ゴルフクラブヘッドのみならず、アイアンクラブヘッドのような中実ゴルフクラブヘッドであってもよい。   The type of the metal head body used in the present invention is not limited, but a thin and lightweight driver head is particularly preferable. For example, a titanium alloy (for example, specific gravity of about 4.5) or an aluminum alloy (for example, specific gravity of about 2). .7) can be suitably used as the driver head having a head volume of 300 to 500 cc. Further, in a head made of stainless steel having a large specific gravity (for example, a specific gravity of 7.8), a driver head having a head volume of 200 to 300 cc can be suitably used. As for the thickness of the head, it is appropriate that the thinnest part of the crown part, the sole part, and the side part is 0.5 to 1.0 mm, particularly 0.6 mm to 0.9 mm. Furthermore, the metal head body used in the present invention may be not only a hollow golf club head but also a solid golf club head such as an iron club head.

本発明において、マグネシウム合金の種類に限定はないが、マグネシウムにアルミニウムおよび亜鉛を添加したものを好適に用いることができる。より具体的には、マグネシウムにアルミニウムを３質量％、亜鉛を１質量％添加したＡＺ３１合金、マグネシウムにアルミニウムを６質量％、亜鉛を１質量％添加したＡＺ６１合金、マグネシウムにアルミニウムを９質量％、亜鉛を１質量％添加したＡＺ９１合金などを好適に用いることができるが、これらに限定されるものではない。   In the present invention, the type of magnesium alloy is not limited, but magnesium added with aluminum and zinc can be suitably used. More specifically, AZ31 alloy in which 3% by mass of aluminum and 1% by mass of zinc are added to magnesium, AZ61 alloy in which 6% by mass of aluminum and 1% by mass of zinc are added to magnesium, 9% by mass of aluminum in magnesium, Although AZ91 alloy etc. which added 1 mass% of zinc can be used suitably, it is not limited to these.

本発明に用いるマグネシウム合金のネジの重さは、１個あたり１〜５ｇであることが好ましい。ネジが軽すぎるとヘッドの振動の抑制に効果がなく、重すぎるとヘッド重量に影響が出るので好ましくない。なお、マグネシウム合金は比重が１．７〜２．０程度である。また、マグネシウム合金はヤング率が４４〜４５ＧＰａとチタニウム合金の半分以下の値、アルミニウム合金の６〜７割程度の値である。   The weight of the magnesium alloy screw used in the present invention is preferably 1 to 5 g per piece. If the screw is too light, the head vibration is not effective, and if it is too heavy, the head weight is affected, which is not preferable. The magnesium alloy has a specific gravity of about 1.7 to 2.0. The magnesium alloy has a Young's modulus of 44 to 45 GPa, a value less than half that of the titanium alloy, and a value of about 60 to 70% that of the aluminum alloy.

マグネシウム合金は腐食し易いため、ネジの表面には防食処理を施す。具体的には、クロメ−ト（６価クロム酸塩）処理、過マンガン酸塩処理、陽極酸化処理、リン酸亜鉛処理等によってネジ表面の防食処理を行ったり、ネジ表面に絶縁塗料や絶縁樹脂をコーティングすることによってネジ表面の防食処理を行ったりすることができる。なお、本発明において、防食処理とは防錆処理を含むものとする。   Since the magnesium alloy is easily corroded, the screw surface is subjected to anticorrosion treatment. Specifically, anticorrosion treatment of the screw surface is performed by chromate (hexavalent chromate) treatment, permanganate treatment, anodizing treatment, zinc phosphate treatment, etc. It is possible to carry out anticorrosion treatment on the screw surface by coating. In the present invention, the anticorrosion treatment includes rust prevention treatment.

防食処理として特に好ましいのは、陽極酸化処理法などを用いてネジ表面に酸化被膜を形成することである。また、マグネシウム合金は異種金属との接触により電解腐蝕が起きやすいので、マグネシウム合金のネジの少なくとも雄ネジ部には塗装を施すことが好ましい。さらに、マグネシウム合金のネジが接触するヘッド本体の雌ネジ部にも塗装を施すことが好ましい。塗装は、表面に酸化被膜を形成したマグネシウム合金との密着性の良いエポキシ系塗料を用いることが適当である。   Particularly preferable as the anticorrosion treatment is to form an oxide film on the screw surface by using an anodizing method or the like. Also, since magnesium alloy is susceptible to electrolytic corrosion due to contact with different metals, it is preferable to coat at least the male thread portion of the magnesium alloy screw. Furthermore, it is preferable to paint also on the female thread part of the head main body which the magnesium alloy screw contacts. For the coating, it is appropriate to use an epoxy paint having good adhesion to the magnesium alloy having an oxide film formed on the surface.

本発明において、マグネシウム合金のネジは、マグネシウム合金の丸棒を用いて、機械加工により作製することができる。マグネシウム合金は、アルミニウム合金やステンレス鋼に比べて切削抵抗が低いので、機械加工が容易である。マグネシウム合金のネジは、機械加工により作製し、アルカリ洗浄により表面の汚れを除去した後、防食処理のために酸洗浄を行うことができる。   In the present invention, a magnesium alloy screw can be produced by machining using a magnesium alloy round bar. Magnesium alloys have a lower cutting resistance than aluminum alloys and stainless steel, and are therefore easy to machine. The magnesium alloy screw can be manufactured by machining, and after removing dirt on the surface by alkali cleaning, acid cleaning can be performed for anticorrosion treatment.

本発明では、マグネシウム合金のネジの雄ネジ部、あるいはマグネシウム合金のネジの雄ネジ部が螺合されるヘッド本体の雌ネジ部に接着剤を塗布することができ、これによりマグネシウム合金のネジがヘッド本体からはずれることを効果的に防止することができる。接着剤としては、例えばエポキシ系接着剤を用いることができる。なお、本発明では、マグネシウム合金のネジに防食処理を施すことにより、ネジとヘッド本体との接着性を向上させることができる。   In the present invention, the adhesive can be applied to the male screw portion of the magnesium alloy screw or the female screw portion of the head main body to which the male screw portion of the magnesium alloy screw is screwed. It can prevent effectively that it remove | deviates from a head main body. As the adhesive, for example, an epoxy adhesive can be used. In the present invention, the adhesion between the screw and the head body can be improved by subjecting the magnesium alloy screw to anticorrosion treatment.

本発明では、ヘッド本体にマグネシウム合金のネジを取り付けた後、ヘッド本体の表面に塗装を施すことができる。このようにすると、ヘッド本体とマグネシウム合金のネジとの間の隙間を塗膜が覆うので、上記隙間に埃や水分が入ることを防ぐことができる。また、アクリル系接着剤などの浸透性の優れた嫌気性接着剤をヘッド本体とマグネシウム合金のネジとの間の隙間に注入してもよい。嫌気性接着剤は、ヘッド本体記とマグネシウム合金のネジとの間の隙間に入って硬化するため、ネジの緩みや、上記隙間に埃や水分が入ることを防止する効果を得ることができる。   In the present invention, after the magnesium alloy screw is attached to the head body, the surface of the head body can be coated. In this case, since the coating film covers the gap between the head body and the magnesium alloy screw, dust and moisture can be prevented from entering the gap. Alternatively, an anaerobic adhesive having excellent permeability such as an acrylic adhesive may be injected into the gap between the head body and the magnesium alloy screw. The anaerobic adhesive enters the gap between the head main body and the magnesium alloy screw and hardens, so that it is possible to obtain an effect of loosening the screw and preventing dust and moisture from entering the gap.

本発明では、金属製ヘッド本体のサイド部にマグネシウム合金のネジを取り付けること、特に金属製ヘッド本体のサイド部に凹部を設け、この凹部内にマグネシウム合金のネジを凹部から突出しないように取り付けることが好ましい。ソール部にマグネシウム合金のネジを取り付けた場合は、ソール部はスイング中に地面と接触するため、マグネシウム合金のネジに傷が付いて酸化被膜や塗料が剥がれ、その傷の部分からマグネシウム合金のネジが腐食する可能性があるが、サイド部にマグネシウム合金のネジを取り付けた場合は、上記のような不都合が生じない。また、ヘッド本体のサイド部に設けた凹部内にマグネシウム合金のネジを凹部から突出しないように取り付けることにより、マグネシウム合金のネジに傷が付くことを効果的に防止することができる。この場合、金属製ヘッド本体のサイド部に肉厚の厚い厚肉部分を形成し、この厚肉部分に上記凹部を設けることが好ましい。また、上記凹部は、ヘッド本体の外面からヘッド本体の中空部に突出していることが好ましい。   In the present invention, a magnesium alloy screw is attached to the side portion of the metal head main body, and in particular, a concave portion is provided in the side portion of the metal head main body, and the magnesium alloy screw is attached in this concave portion so as not to protrude from the concave portion. Is preferred. When a magnesium alloy screw is attached to the sole part, the sole part comes into contact with the ground during the swing, so the magnesium alloy screw is scratched and the oxide film or paint is peeled off, and the magnesium alloy screw is removed from the scratched part. However, when a magnesium alloy screw is attached to the side portion, the above-described disadvantage does not occur. Moreover, it is possible to effectively prevent the magnesium alloy screw from being damaged by attaching the magnesium alloy screw so as not to protrude from the recess in the recess provided in the side portion of the head body. In this case, it is preferable to form a thick part in the side part of the metal head main body and to provide the concave part in the thick part. Moreover, it is preferable that the said recessed part protrudes in the hollow part of a head main body from the outer surface of a head main body.

本発明の金属製ゴルフクラブヘッドによれば、好ましい打感、打音を得るこができる。   According to the metal golf club head of the present invention, a favorable feel and sound can be obtained.

以下、本発明の実施の形態を図面を参照して説明するが、本発明は下記例に限定されるものではない。図１（ａ）は本発明の一実施形態に係る金属製ゴルフクラブヘッドのヘッド本体を示す斜視図、図１（ｂ）は同ヘッド本体の図１（ａ）Ｔ１−Ｔ１断面図、図２（ａ）は同ヘッド本体の図１（ａ）とは別の方向から見た斜視図、図２（ｂ）は同ヘッド本体の図２（ａ）Ｔ２−Ｔ２断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following examples. FIG. 1A is a perspective view showing a head body of a metal golf club head according to an embodiment of the present invention, FIG. 1B is a sectional view of the head body in FIG. 1A T1-T1, FIG. FIG. 2A is a perspective view of the head body viewed from a direction different from FIG. 1A, and FIG. 2B is a cross-sectional view of the head body taken along line T2-T2.

本例のヘッド本体１０は、ソール部１２、クラウン部１４、トウ側サイド部１６、ヒール側サイド部１８およびバック側サイド部２０を有し、内部には中空部２２が形成され、フェース側にはフェース部材により閉塞される開口部２３が形成されている。また、本例のヘッド本体１０は、トウ側サイド部１６、ヒール側サイド部１８にそれぞれ凹部２４、２６が設けられている。凹部２４、２６は、ヘッド本体１０の外面からヘッド本体１０の中空部２２に突出し、先端は開口している。また、凹部２４、２６は、ヘッド本体１０の外面側に大径部２８を有し、その先方に小径部３０を有し、小径部３０の周面には雌ネジ３９が形成されている。なお、図中３８はシャフト挿入部である。   The head main body 10 of this example has a sole portion 12, a crown portion 14, a toe side portion 16, a heel side portion 18 and a back side portion 20, and a hollow portion 22 is formed inside, and on the face side. Is formed with an opening 23 closed by the face member. Further, in the head main body 10 of this example, the toe side side portion 16 and the heel side side portion 18 are provided with recesses 24 and 26, respectively. The recesses 24 and 26 protrude from the outer surface of the head body 10 to the hollow portion 22 of the head body 10, and the tips are open. The recesses 24 and 26 have a large-diameter portion 28 on the outer surface side of the head main body 10, a small-diameter portion 30 at the tip, and a female screw 39 is formed on the peripheral surface of the small-diameter portion 30. In the figure, reference numeral 38 denotes a shaft insertion portion.

そして、凹部２４、２６には、それぞれマグネシウム合金のネジ３２が嵌合されている。ネジ３２は、図３に示すように、凹部２４、２６の大径部２８、小径部３０に対応する大径部３４、小径部３６を有し、小径部３６の周面に雄ネジ３７が形成されたネジであり、凹部２４、２６の小径部３０に形成された雌ネジ３９に小径部３６を螺合することにより、ヘッド本体１０に固定されている。なお、本例では、凹部２４、２６の大径部２８の内周面とネジ３２の大径部３４の外周面との間には若干の隙間が形成されている。   The recesses 24 and 26 are respectively fitted with magnesium alloy screws 32. As shown in FIG. 3, the screw 32 has a large-diameter portion 28 and a small-diameter portion 36 corresponding to the large-diameter portion 28 and the small-diameter portion 30 of the concave portions 24 and 26, and a male screw 37 is provided on the peripheral surface of the small-diameter portion 36. The formed screw is fixed to the head body 10 by screwing the small-diameter portion 36 into the female screw 39 formed in the small-diameter portion 30 of the recesses 24 and 26. In this example, a slight gap is formed between the inner peripheral surface of the large-diameter portion 28 of the recesses 24 and 26 and the outer peripheral surface of the large-diameter portion 34 of the screw 32.

本例では、ネジ３２の表面に陽極酸化処理により酸化被膜が形成されているとともに、その上にエポキシ系塗料が塗工されている。また、凹部２４、２６の内周面にもエポキシ系塗料が塗工されている。さらに、ヘッド本体１０とネジ３２との間の隙間（凹部２４、２６の段部とネジ３２の段部との間の隙間）には嫌気性接着剤４１が注入されている。   In this example, an oxide film is formed on the surface of the screw 32 by anodic oxidation, and an epoxy-based paint is applied thereon. An epoxy paint is also applied to the inner peripheral surfaces of the recesses 24 and 26. Further, an anaerobic adhesive 41 is injected into a gap between the head body 10 and the screw 32 (a gap between the step portions of the recesses 24 and 26 and the step portion of the screw 32).

なお、上記例では、トウ側サイド部およびヒール側サイド部にネジを配置したが、本発明におけるネジの配置箇所はこれに限定されるものではなく、トウ側サイド部１６、ヒール側サイド部１８およびバック側サイド部２０から選ばれる１箇所または２箇所以上に適宜ネジを配置することができる。   In the above example, the screws are arranged on the toe side portion and the heel side portion, but the arrangement location of the screws in the present invention is not limited to this, and the toe side portion 16 and the heel side portion 18 are not limited thereto. And a screw | thread can be suitably arrange | positioned in one place or two or more places chosen from the back side part 20. FIG.

図１、図２に示した実施形態の金属製ゴルフクラブヘッドのヘッド本体を作製した。この場合、ヘッド本体は、Ｔｉ−６Ａｌ−４Ｖチタニウム合金を用いてインベストメント鋳造により作製した。フェース部材は、β型チタニウム合金を用いてプレス成形により作製した。ネジは、マグネシウム合金（ＡＺ６１合金）により作製した。ネジは、全長が１５．５ｍｍ、大径部の長さが１０ｍｍ、大径部の直径が９．８ｍｍ、小径部の直径が５．７５ｍｍ、質量が１．５ｇであった。ヘッド本体にフェース部材を溶接により固定するとともに、ヘッド本体の２つの凹部にネジをそれぞれ固定してゴルフクラブヘッドを完成させた。本例の金属製ゴルフクラブヘッドは、ヘッド体積が４６０ｃｃ、クラウン部の最も薄い部分の厚みが０．６ｍｍ、ソール部の最も薄い部分の厚みが０．９ｍｍ、サイド部の最も薄い部分の厚みが０．７ｍｍであった。フェース部材は、厚さ２．６〜３．６ｍｍの部分肉厚フェース部材であった。また、サイド部の凹部を設けた部分は肉厚にした。   A head body of the metal golf club head of the embodiment shown in FIGS. 1 and 2 was produced. In this case, the head body was produced by investment casting using a Ti-6Al-4V titanium alloy. The face member was produced by press molding using a β-type titanium alloy. The screw was made of a magnesium alloy (AZ61 alloy). The total length of the screw was 15.5 mm, the length of the large diameter portion was 10 mm, the diameter of the large diameter portion was 9.8 mm, the diameter of the small diameter portion was 5.75 mm, and the mass was 1.5 g. A face member was fixed to the head main body by welding, and screws were fixed to two concave portions of the head main body to complete a golf club head. The metal golf club head of this example has a head volume of 460 cc, the thickness of the thinnest part of the crown part is 0.6 mm, the thickness of the thinnest part of the sole part is 0.9 mm, and the thickness of the thinnest part of the side part. It was 0.7 mm. The face member was a partially thick face member having a thickness of 2.6 to 3.6 mm. Moreover, the part which provided the recessed part of the side part was made thick.

上記金属製ゴルフクラブヘッドを用いてゴルフクラブを作製し、ゴルファーの実打により打感、打音を評価した。また、２つの凹部にネジとしてそれぞれナイロン製のネジを固定した中空アイアンゴルフクラブヘッド（比較例１）と、２つの凹部にネジとしてそれぞれステンレス鋼製のネジを固定した中空アイアンゴルフクラブヘッド（比較例２）を用いて同様の評価を行った。マグネシウム合金製ネジの重量は１．５ｇ／個、ナイロン製ネジの重量は０．９ｇ／個、ステンレス鋼製ネジの重量は６．５ｇ／個であった、その結果、ゴルファーによる評価は下記のようなものになった。
（実施例の金属製ゴルフクラブヘッド）
・ステンレス鋼製ネジを用いたクラブヘッドとナイロン製ネジを用いたクラブヘッドの中間の打音である。
・音がこもらず、高い音が響く。
・音だけ響く感じ。
・フェース面にボールの弾き感があり、丁度よい。
（比較例１の金属製ゴルフクラブヘッド）
・音がこもる。
・マイルドな打感だが、多少物足りない。
・打った感じがしっかり伝わらない。
・響き感が無く、弾き感が少ないので、ボールが遠くへ飛んでいく感じがしない。（比較例２の金属製ゴルフクラブヘッド）
・音が響き、ヘッドが硬い感じがする。
・音が高い。
・フェース面で球の弾き感があり、球離れが早く感じる。
・ボールをコントロールして飛ばすのが難しく感じる。 Golf clubs were produced using the above metal golf club heads, and the hit feeling and the hitting sound were evaluated by the golfer's actual hitting. Further, a hollow iron golf club head (Comparative Example 1) in which nylon screws are fixed as screws in two recesses, and a hollow iron golf club head in which stainless steel screws are fixed as screws in two recesses (Comparison) A similar evaluation was carried out using Example 2). The weight of the magnesium alloy screw was 1.5 g / piece, the nylon screw weight was 0.9 g / piece, and the stainless steel screw weight was 6.5 g / piece. As a result, the golfer evaluated the following: It became something like this.
(Metal Golf Club Head of Example)
The sound is intermediate between a club head using a stainless steel screw and a club head using a nylon screw.
・ There is no noise and a high sound is heard.
・ It feels like only sound.
-There is a feeling of playing the ball on the face, just good.
(Metal Golf Club Head of Comparative Example 1)
・ Sound is muffled.
-Mild feel, but somewhat unsatisfactory.
・ The feeling of hitting cannot be transmitted.
・ Since there is no feeling of sound and there is little feeling of playing, there is no feeling that the ball flies far away. (Metal Golf Club Head of Comparative Example 2)
・ The sound resonates and the head feels hard.
・ Sound is high.
・ There is a feeling of playing the ball on the face, and the ball feels away quickly.
・ It feels difficult to fly by controlling the ball.

また、実施例、比較例１、比較例２のゴルフクラブヘッドを用い、ヘッドの振動周波数と減衰比との関係をモーダル解析により調べた。モーダル解析とは、以下に説明する解析方法である。すなわち、構造物に外部から力が加わると、構造物は振動し始め、継続的に振動する。この振動は、固有の形（固有モード）を持ち、特有の振動数（固有振動）で振動し、減衰（モード減衰比）していく。モーダル解析は、この固有の動的性質（モーダルパラメータ）、つまり固有モード、固有振動、モード減衰比を求める解析方法である。本実験では、インパクトハンマーを用いたモーダル解析により、ゴルフクラブヘッドの振動特性の評価を行った。結果を図４のグラフに示す。   Further, using the golf club heads of the example, comparative example 1 and comparative example 2, the relationship between the vibration frequency of the head and the damping ratio was examined by modal analysis. Modal analysis is an analysis method described below. That is, when a force is applied to the structure from the outside, the structure starts to vibrate and continuously vibrates. This vibration has a specific shape (natural mode), vibrates at a specific frequency (natural vibration), and attenuates (mode damping ratio). The modal analysis is an analysis method for obtaining this inherent dynamic property (modal parameter), that is, the natural mode, natural vibration, and mode damping ratio. In this experiment, the vibration characteristics of the golf club head were evaluated by modal analysis using an impact hammer. The results are shown in the graph of FIG.

マグネシウム合金製ネジを用いた実施例のゴルフクラブヘッドは、低周波領域ではステンレス鋼製ネジを用いた比較例２のゴルフクラブヘッドより減衰比が高く、５０００Ｈｚ以上の高周波領域ではステンレス鋼製ネジを用いた比較例２のゴルフクラブヘッドと減衰比が同等であり、適当な振動減衰特性を有することがわかる。これに対し、ナイロン製ネジを用いた比較例１のゴルフクラブヘッドは、全周波数領域で減衰比が高く、振動抑制効果が高すぎることがわかる。また、ステンレス鋼製ネジを用いた比較例２のゴルフクラブヘッドは、全周波数領域で減衰比が低く、振動抑制効果が低いことがわかる。   The golf club head of the example using magnesium alloy screws has a higher damping ratio than the golf club head of Comparative Example 2 using stainless steel screws in the low frequency region, and stainless steel screws in the high frequency region of 5000 Hz or higher. It can be seen that the damping ratio is equivalent to that of the golf club head of Comparative Example 2 used, and it has appropriate vibration damping characteristics. On the other hand, it can be seen that the golf club head of Comparative Example 1 using nylon screws has a high damping ratio in all frequency regions, and the vibration suppression effect is too high. Further, it can be seen that the golf club head of Comparative Example 2 using stainless steel screws has a low damping ratio in all frequency regions and a low vibration suppressing effect.

図１（ａ）は本発明の一実施形態に係る金属製ゴルフクラブヘッドのヘッド本体を示す斜視図、図１（ｂ）は同ヘッド本体の図１（ａ）Ｔ１−Ｔ１断面図である。FIG. 1A is a perspective view showing a head body of a metal golf club head according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the head body taken along line T1-T1 in FIG. 図２（ａ）は同ヘッド本体の図１（ａ）とは別の方向から見た斜視図、図２（ｂ）は同ヘッド本体の図２（ａ）Ｔ２−Ｔ２断面図である。2A is a perspective view of the head body viewed from a direction different from FIG. 1A, and FIG. 2B is a cross-sectional view of the head body taken along line T2-T2. ヘッド本体にマグネシウム合金のネジを取り付けた状態を示す拡大断面図である。It is an expanded sectional view which shows the state which attached the screw of the magnesium alloy to the head main body. 実施例、比較例のゴルフクラブヘッドにおけるヘッドの振動周波数と減衰比との関係を示すグラフである。5 is a graph showing the relationship between the vibration frequency of the head and the damping ratio in golf club heads of examples and comparative examples.

符号の説明Explanation of symbols

１０ ヘッド本体１０
１２ ソール部
１４ クラウン部
１６ トウ側サイド部
１８ ヒール側サイド部
２０ バック側サイド部
２２ 中空部
２４ 凹部
２６ 凹部
３２ ネジ 10 Head body 10
12 sole part 14 crown part 16 toe side part 18 heel side part 20 back side part 22 hollow part 24 recessed part 26 recessed part 32 screw

Claims (7)

金属製ヘッド本体の所定箇所に防食処理を施したマグネシウム合金のネジを取り付けたことを特徴とする金属製ゴルフクラブヘッド。   A metal golf club head, wherein a magnesium alloy screw subjected to anticorrosion treatment is attached to a predetermined portion of the metal head main body. 前記防食処理を施したマグネシウム合金のネジは、表面に酸化被膜を形成したものであることを特徴とする請求項１に記載の金属製ゴルフクラブヘッド。   The metal golf club head according to claim 1, wherein the anticorrosive magnesium alloy screw has an oxide film formed on a surface thereof. 前記防食処理を施したマグネシウム合金のネジは、機械加工により雄ネジ部を作製した後、表面に酸化被膜を形成したものであることを特徴とする請求項１または２に記載の金属製ゴルフクラブヘッド。   3. The metal golf club according to claim 1, wherein the anticorrosive magnesium alloy screw is formed by forming a male screw portion by machining and then forming an oxide film on the surface. 4. head. 前記防食処理を施したマグネシウム合金のネジは、雄ネジ部に塗装が施されていることを特徴とする請求項１〜３のいずれか１項に記載の金属製ゴルフクラブヘッド。   The metal golf club head according to any one of claims 1 to 3, wherein the anticorrosive magnesium alloy screw is coated on a male screw portion. 金属製ヘッド本体の所定箇所に防食処理を施したマグネシウム合金のネジを取り付けた後、金属製ヘッド本体の表面に塗装を施したことを特徴とする請求項１〜４のいずれか１項に記載の金属製ゴルフクラブヘッド。   5. The surface of the metal head main body is coated after a magnesium alloy screw subjected to anticorrosion treatment is attached to a predetermined portion of the metal head main body. 6. Metal golf club head. 金属製ヘッド本体のサイド部に防食処理を施したマグネシウム合金のネジを取り付けたことを特徴とする請求項１〜５のいずれか１項に記載の金属製ゴルフクラブヘッド。   6. The metal golf club head according to claim 1, wherein a magnesium alloy screw subjected to anticorrosion treatment is attached to a side portion of the metal head main body. 金属製ヘッド本体のサイド部に凹部を設け、前記凹部内にマグネシウム合金のネジを該凹部から突出しないように取り付けたことを特徴とする請求項１〜６のいずれか１項に記載の請求項１に記載の金属製ゴルフクラブヘッド。   The recess according to claim 1, wherein a recess is provided in a side portion of the metal head main body, and a magnesium alloy screw is mounted in the recess so as not to protrude from the recess. 2. A metal golf club head according to 1.
JP2006281405A 2006-10-16 2006-10-16 Metallic golf club head Pending JP2008093335A (en)

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